Ultra -thin down lamp convenient to dismantle

The utility model discloses an ultra -thin down lamp convenient to dismantle, including face ring sum heat dissipation back lid, face ring upside both ends are equipped with the spring card, are equipped with outer fixed ring admittedly on lieing in the inboard face ring of two spring cards, are equipped with the draw -in groove on the fixed ring admittedly outward, and the joint has the buckle inthe draw -in groove, and the buckle lies in internal stability fixed ring side, and internal stability fixed ring fixed mounting is in heat dissipation hou gai bottom. The utility model discloses when the installation that encircles is kneaded dough to the back lid that dispels the heat to the structure, aim at the vertical groove on the outer fixed ring admittedly with the buckle on the internalretaining ring, press heat dissipation back lid downwards, vertical trough rim is buckled along pushing away of extrusion hemisphere type, when the buckle slides vertical tank bottom end, heat dissipation back lid rotates, ma